Owner's Manual
Pneumatic 3/8" Drive
RATC ET
Model No.
875.191174
WARNING:
Before operating tool, read this
manual and follow all
Safety Recommendations and
Operating Instructions.
Safety
Warranty
Features & Operation
Maintenance
Espa_ol
Distributed by Sears,
www,Sears,com
Roebuck and Co.,
Hoffman
Estates,
IL 60179
iNSTRUCTiONS PERTAiNiNG TO A RiSK OF FIRE, ELECTRIC SHOCK, OR
iNJURY TO PERSONS
WARNING- Some dust created by using power tools contains chemicals known to the
State of California to cause cancer and birth defects or other reproductive harm
WARNING-When using the product, basic precautions should always be
followed, including the following:
General: To reduce the risks of electric shock, fire, and injury to persons,
read all the instructions before using the tool.
Work area
t, Keep the work area clean and well lighted, Cluttered benches and dark areas
increase the risks of electric shock, fire and injury to persons.
2. Do not operate the tool in explosive atmospheres, such as in the presence
of flammable liquids, gases, or dust. The tool is able to create sparks resulting in
the ignition of the dust orfumes.
3. Keep bystanders, children, and visitors away while operating the product.
Distractions are able to result in the loss of control of the tool.
Personal safety
1. Stay alert. Watch what you are doing and use common sense when operating
the product. Do not use the product while tired or under the influence of
drugs, alcohol, or medication. A moment of inattention while operating the tool increases
the risk of injury to persons.
2. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep
hair, clothing, and gloves away from moving paris. Loose clothes, jewelry, or long
hair increases the risk of injury to persons as a result of being caught in moving parts.
3, Remove adjusting keys and wrenches before turning the tool on. A wrench or a
key that is left attached to a rotating part of the tool increase the risk of personal injury.
4, Do not overreach. Keep proper footing and balance at all times, Proper footing
and balance enables better control of the tool in unexpected situations.
5. Use safety equipment. A dust mask, non-skid safety shoes and a hard hat must be used for
the applicable conditions.
6. Always wear eye protection.
7. Always wear hearing protection when using the tool. Prolonged exposure to high
intensity noise is able to cause hearing loss.
8. Disconnect the product from the air source before making any adjustments.
9. Avoid unintentional starting. Be sure the switch is off before connecting to
the air supply. Do not carry the tool with your finger on the switch or connect the tool to the
air supply with the switch on.
A CAUTION J
1. Inspect hose connection before each use;
2. Do not exceed 90psi when using pneumatic tools.
3. Do not kink, twist, knot or abrade hose.
Applicable Range:
is applicable for pneumatic tools and accessories.
Specifications:
Air tools Maximum Working Pressure .......... 90psi
Operation
Tool use and care
1. Use clamps or another practical way to secure and support the workpiece
to a stable platform. Holding the work by hand or against the body is unstable and to lead
to loss of control.
2. Do not force the tool. Use the correct tool for the application. The correct tool
will do the job better and safer at the rate for which the tool is designed.
3. Do not use the tool if the switch does not turn the tool on or off, Any tool that
cannot be controlled with the switch is dangerous and must be repaired.
4. Disconnect the tool from the air source before making any adjustments,
changing accessories, or storing the tool, Such preventive safety measures reduce
the risk of starting the tool unintentionally.
5. Store the tool when it is idle out of children and other untrained persons. A
tool is dangerous in the hands of untrained users.
6. Maintain the tool with care. Keep a cutting tool sharp and dean. A property maintained
too, with sharp cutting edges reduced the risk of binding and is easier to control.
7.Check for misalignment or binding of moving parts, breakage of parts, and
any other condition that affects the tool's operation, if damaged, have the tool
serviced before using. Many accidents are caused by poorly maintained tools. There is a risk
of bursting if the tool is damaged.
8 Use only accessories that are identified by the manufacturer for the specific
tool model. Use of an accessory not intended for use with the specific tool model, increases
the risk of injury to persons.
ENG-3
Service
1. Too| service must be performed on|y by qualified repair personne|.
2. When servicing a tool, use only identical replacement parts. Use only
authorized parts.
3. Use only the lubricants supplied with the tool of specified by the
manufacturer.
Air source
1. Never connect to an air source that is capable of exceeding 115psi.Over
pressurizing the tool is able to result in busting, abnormal operation, and breakage of the
tool or serious injury to persons. Use only clean, dry, regulated compressed air at the rated
pressure or within the rated pressure range as marked on the tool. Always verify prior to using
the tool that the air source has been adjusted to the rated air pressure or within the rated
air-pressure range.
2. Never use oxygen, carbon dioxide, combustible gases or any bottled gas as an air source for
the tool. Such gases are capable of explosion and serious injury to persons.
USER-MAINTENANCE INSTRUCTIONS
SAVE THESE iNSTRUCTiONS
ENG-4
ReadOperatingInstructions
Pleasebecomefamiliarwithalltheinstructionsand
warningsbeforeoperatinganypneumatictool.
AlwaysWearApprovedEyeProtection
Impactresistanteyeprotectionshouldmeetorexceed
thestandardssetforthinANSIZ87.1,Occupationaland
EducationalEyeandFaceProtection.Lookformarking
Z87.1onyoureyeprotectiontoensurethatitisan
approvedstyle.
HearingProtectionisRecommended
Hearingprotectionshouldbeusedwhenthenoiselevel
exposureequalsorexceedsan8hourtime-weighted
averagesoundlevelof85dBA.Processnoise,reflective
surfaces,othertoolsbeingoperatednearby,alladdtothe
noiselevelinagivenworkarea.Ifyouareunableto
determineyournoiselevelexposure,werecommendthe
useofhearingprotection.
AvoidProlongedExposuretoVibration
Pneumatictoolscanvibrateduringuse.Prolonged
exposuretovibrationorveryrepetitivehandandarm
movementscancauseinjury.Discontinuetheuseofany
toolifyouexperiencetingling,numbness,discomfortor
paininyourhandsorarms.Youshouldconsultyour
physicianbeforeresuminguseoftool.
90PSIMaximum
Thistoolisdesignedtooperateatanairpressureof90
poundspersquareinchgaugepressure(90PSI)
maximum,atthetool.Useofhigherairpressurecan,and
maycauseinjury.Also,theuseofhigherairpressure
placestheinternalcomponentsunderloadsand
stressestheywerenotdesignedfor,causingpremature
toolfailure.
NOTE:THEAIRSUPPLYSHOULDBECLEAN,DRYAND
PREFERABLYLUBRICATED.FORBESTRESULTS
DRAINTHEMOISTUREFROMYOURCOMPRESSOR
DAILY.
Use Only Power Sockets & Accessories
Sockets and accessories used shall be of the power
socket type. Always check sockets, retainers and
drives regularly for wear or damage and replace when
necessary.
WARNING
Some dust created by power sanding, sawing, grinding,
drilling and other construction activities contains chemi-
cals known to the State of California to cause cancer, birth
birth defects or other reproductive harm.
Some examples of these chemicals are:
Lead from lead based paint
crystalline silica from bricks and cement
and other masonry products, and
arsenic and chromium from chemically-
treated lumber.
Your risk from those exposures varies, depending on how
often you do this type of work. To reduce your exposure to
these chemicals: work in a well ventilated area, and work
with approved safety equipment, such as dust masks that
are specifically designed to filter out microscopic par-
ticles.
FULLONE YEARWARRANTYON CRAFTSMANAIR-DRIVETOOLS
If this Craftsman tool fails to give complete satisfaction
within one year from the date of purchase, RETURN IT
TO THE NEAREST SEARSSTORE IN THE UNITED
STATES,and Sears will repair or replace it free of charge.
If this Craftsman tool is used for commercial or rental
purposes, this warranty applies for only 90 days from the
date of purchase. This warranty gives you specific legal
rights, and you may also have other rights which vary
from state to state.
Distributed by Sears, Roebuck and Co.
Hoffman Estates, IL 60179.
The Craftsman Model 875.191174 3/8" Drive Ratchet
Wrench is designed for applications such as automotive
repair, general assembly, transmission teardown and
maintenance. Features include a lever throttle for speed
control and low profile head for work in close quarters.
Features
Lever throttle for ease of operation.
1-1/8" Ratchet head height (without socket) for use in
close-quarter applications.
Front exhaust directs air away from operator.
Specifications
Drive size......................................................................................3/8"
Free speed (No Load) ..............................................160 RPM
Ultimate torque .........................................................45 ft. Ibs.
Weight ..................................................................................21/2Ibs.
Overall length .............................................................................10"
Average air consumption ......................................3.2 SCFM
Recommended hose size ........................................3/8" I.D.
Air inlet .................................................................................1/4" NPT
Maximum Air Pressure ...................................................90 PSI
Pre-Operation
Before the tool is connected to the air supply, clear the air
hose of accumulated dust and moisture by running air
freely through the air hose for 5-10 seconds. Before
removing a tool for service, make sure the air line is shut-
offat the compressor. This will prevent the tool from
operating if the throttle is accidently engaged.
Installation (See figure 1)
This tool is designed to operate at 90 psi. Lower pres-
sure (below 90 psi) will reduce performance of the tool
while higher air pressure (over 90 psi) raises the perfor-
mance of the tool beyond its rated capacity and could
cause serious damage to tool and user.
Always use clean dry air. Excessive moisture and dirt will
greatly reduce the life of any air motor. We recommend
the installation of an in-line filter-regulator-lubricator as
close to the tool as possible.
A 3/8" air hose is required up to a length of 8 ft. If more
length is required a 1/2" air hose should be used at the
compressor. Attach a 3/8" whip hose for the remaining
4 - 8 ft. for flexibility. Be sure all hoses and fittings are the
correct size and tightly secured before using air tool.
::_ Auto Drain
_ Valve
More than 1/100 slope
Stop
VaJve
Filter
Regulator
Lubricator
Air Tool
Figure 1
Air Hose Hook Up
Main line = 3 times
Tool inlet/hose size
Stop
Valvel
Air Compressor
WARNING: BISCONNECTTOOL FROM AIR SUPPLY
BEFORE SERVICING OR CHANGING SOCKETS, This
ratchet is equipped with a lever throttle which allows the
operator to vary the speed. Direction control is located on
the back of the ratchet head. Initial tightening and loosen =
ing of fasteners should be done manually with ratchet
used as a hand tool. Fasteners may then be run on and
off with relative ease.
Keep socket firmly against work surface when running the
ratchet to avoid dislodging the socket from the anvil.
Excessive torque leverage above tool specifications will
result in premature gear wear.
Reverse Switch
I
Figure 2
t-- Air Inlet
I
Throttle Lever
Lubrication
An in-line filter-regulator=lubricator (fig 1) is recommended
as it increases tool life and keeps the tool in sustained
operation. The in-line lubricator should be regularly
checked and filled with air tool oil. Proper adjustment of
the in-line lubricator is performed by placing a sheet of
paper next to the tools exhaust ports and holding the
throttle open approximately 30 seconds. The lubricator is
properly set when a light stain of oil collects on the paper.
Excessive amounts of oil should be avoided.
In the event that it becomes necessary to store the tool for
an extended period of time (overnight, weekend, etc.), it
should receive a generous amount of lubrication through
the air inlet (fig 2). The tool should be run for
approximately 30 seconds to ensure oil has been evenly
distributed throughout the tool. The tool should be stored
in a clean and dry environment.
Recommended lubricants: Use air tool oil or any other
high grade turbine oil containing moisture absorbent, rust
inhibitors,metal wetting agents and an EP (extreme
pressure) additive. (See Fig. 2 for location/air inlet).
Sears CRAFTSMAN Model 875.191174
Pneumatic 3/8" Drive Ratchet Wrench
Exploded View and Parts List
42
28
26
25
23
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//12
/
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r/19
20
22
Ref.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Part No.
985001G
985002-01G
985003G
9150070G
9106464G
9106465G
9106365G
9106467G
946011G
927503G
985011G
9106469G
9106470G
9106471G
9106472G
9106473G
9106686G
9106476G
9106477G
985020G
9106680G
915012-02G
9145024G
Description Q'ty
Housing 1
Air Inlet Bushing 1
Washer 1
O-Ring 1
Valve Stem 1
Valve Spring 1
O-Ring 1
Valve Screw 1
Throttle Lever Pin 1
Valve Bushing 1
Throttle Lever 1
Ball Bearing 1
Rear End Plate 1
Rotor Blade 4
Rotor 1
Spring Pin 2
Cylinder 1
Front End Plate 1
Ball Bearing 1
Exhaust Deflector 1
Bearing Cap 1
Internal Gear 1
Clamp Nut 1
Ref. Part No. Description
24 9150140G Planet Gear
25 9106482G Idle Gear Seat
26 9106481G Needle Roller
27 985047G Handle Grip
28 9106484G Anvil Bushing
29 9106485G Needle Bearing
30 915038G Reverse Switch
31 915042G Washer
32 9150190G Ratchet Housing
33 9150180G Ratchet Anvil
34 9106491G Spring
35 9106490G Locking Pin
36 9150360G Ratchet Pawl
37 9106500G Retainer Ring
38 9150320G Thrust Washer
39 9150370G Pin
40 9106497G Steel Ball
41 9106496G Spring
42 9106486G Crank Shaft
43 9106698G Drive Bushing
44 9115023G Ratchet Yoke
45 9150430G Steel Ball
46 9150440G Spring
Q'ty
3
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
Troubleshooting
Tool runs slowly or will not operate
1.Grit or gum in tool
1. Flush the tool with air tool oil or gum
solvent.
2. No oil in tool
3. Low air pressure
4. Air hose leaks
5. Pressure drops
6. Worn rotor blade in motor
7. Worn ball bearing in motor
2. Lubricate the tool according to the lubrication
instructions in this manual
3.a. Adjust the regulator on the tool to the maxi-
mum setting
b. Adjust the compressor regulator to tool
maximum of 90 psi.
4.Tighten and seal hose fittings if leaks are found
use pipe thread tape.
5.a. Be sure the hose is the proper size. Long
hoses or tools using large volumes of air may
require a hose with an I.D. of 1/2" or larger
depending on the total length of the hose
b. Do not use a multiple number of hoses
connected together with quick connect fittings.
This causes additional pressure drops and
reduces the tool power. Directly connect the
hoses together
6. Replace rotor blade
7. Remove and inspect bearing for rust, dirt and
grit. Replace or clean and grease bearing with
bearing grease
Moisture blowing out of tool exahust 1.Water in tank 1.Drain tank. (See air compressor manual). Oil tool
and run until no water is evident. Oil tool again and
run 1-2 seconds
Impacts slowly or will not impact 1. Lack of lubrication
2.Tool regulator set in wrong
position
3. In-line regulator or
compressor regulator
set too low
1.Lubricate the air motor and the impact mechanism.
(See Lubrication section of this manual)
2. Adjust the regulator on the tool to the maximum
setting
3. Adjust regulators in the air system
Impacts rapidly but
1. Worn impact mechanism 1.Replace worn impact mechanism components
will not remove bolts
Does not impact 1. Broken impact mechanism 1.Replace broken impact mechanism components
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Service Notes:
For the repair or replacement
parts you need delivered directly to your home
Call 7 am - 7 pm, 7 days a week
1-800-366-PART
(1-800-366-7278)
Para ordenar piezas con entrega
a domicilio - 1-800-659-7084
For the location of a
Sears Parts and Repair Center
in your area
Call 24 hours a day, 7 days a week
1-800-488-1222
For more information on
purchasing a Sears
Maintenance Agreement or to inquire
about an existing Agreement
Call 9 am - 5 pm, Monday-Saturday
1-800-827-6655
The model number of your air tool is located
on the serial plate attached to the tool.
When requesting service or ordering parts,
always give the following information:
• Product Type • Pneumatic Tool
• Model Number • Part Description
SEARS
Distributed by Sears, Roebuck and Co., Hoffman Estates, IL 60179 USA
/